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US 12,222,139 B2Granted
Heat pump with ejector
AssigneeCarrier Corporation
InventorsAhmad M. Mahmoud, Parmesh Verma, Zuojun Shi, Frederick J. Cogswell
Life of this patent
Estimating the term…
Abstract
A system has: a compressor having a suction port and a discharge port; an ejector having a motive flow inlet, a suction flow inlet, and an outlet; a separator having an inlet, a vapor outlet, and a liquid outlet; a first heat exchanger; an expansion device; and a second heat exchanger. Conduits and valves are positioned to provide alternative operation in: a cooling mode and a heating mode. In the cooling mode, a needle of the ejector is closed. In the heating mode refrigerant passes sequentially from a first section of the second heat exchanger to a second section. In the cooling mode refrigerant passes in parallel through the first section and the second section.
Claims15
A system (300;
- 600) comprising:
- a compressor (22) having a suction port (40) and a discharge port (42);
- an ejector (32) having a motive flow inlet (50), a suction flow inlet (52), and an outlet (54), the ejector being a controllable ejector having a needle (60) shiftable between a closed position and a plurality of open positions;
- a separator (34) having an inlet (72), a vapor outlet (74), and a liquid outlet (76);
- a first heat exchanger (24;
- 602);
- an expansion device (28);
- a second heat exchanger (302) having a first section (336) and a second section (338);
- and
- a plurality of conduits (80, 110, 140, 144, 148, 152, 154, 156) and a plurality of valves (100, 130, 310, 320, 380;
- 100, 130, 310, 320, 380, 680, 682, 684) positioned to provide alternative operation in:
- a cooling mode wherein the needle is in the closed position to block flow from the motive flow inlet;
- and
- a heating mode wherein a flowpath segment passes from the second heat exchanger through the motive flow inlet, the separator inlet and liquid outlet, and the expansion device and to the first heat exchanger,
- wherein the plurality of valves are positioned so that:
- in the heating mode refrigerant passes sequentially from the first section (336) to the second section (338);
- and
- in the cooling mode refrigerant passes in parallel through the first section (336) and the second section (338).
15 more elements
A system (600) comprising:
- a compressor (22) having a suction port (40) and a discharge port (42);
- an ejector (32) having a motive flow inlet (50), a suction flow inlet (52), and an outlet (54), the ejector being a controllable ejector having a needle (60) shiftable between a closed position and a plurality of open positions;
- a separator (34) having an inlet (72), a vapor outlet (74), and a liquid outlet (76);
- a first heat exchanger (602);
- at least one expansion device (28);
- a second heat exchanger (302);
- and
- a plurality of conduits (80, 110, 140, 144, 148, 152, 154, 156) and a plurality of valves (100, 130, 310, 320, 380, 680, 682, 684) positioned to provide alternative operation in:
- a cooling mode wherein a flowpath segment passes from the first heat exchanger through a first expansion device (28) of the at least one expansion device to the second heat exchanger and the needle is in the closed position to block flow from the motive flow inlet;
- a first heating mode wherein a flowpath segment passes from the second heat exchanger through the motive flow inlet, the separator inlet and liquid outlet, and the first expansion device and to the first heat exchanger;
- and
- a second heating mode wherein:
- a flowpath segment passes from the second heat exchanger through the first expansion device to the first heat exchanger;
- and
- the ejector has a suction flow and the needle is in the closed position to block flow from the motive flow inlet,
- wherein:
- the first heat exchanger comprises:
- a first manifold (674);
- a second manifold (676);
- and
- a third manifold (622);
- in the cooling mode refrigerant passes through a first section of the first heat exchanger and a second section of the first heat exchanger in series;
- and
- in the first heating mode refrigerant passes through the first section of the first heat exchanger and the second section of the first heat exchanger in parallel.
21 more elements
A system (600) comprising:
- a compressor (22) having a suction port (40) and a discharge port (42);
- an ejector (32) having a motive flow inlet (50), a suction flow inlet (52), and an outlet (54), the ejector being a controllable ejector having a needle (60) shiftable between a closed position and a plurality of open positions;
- a separator (34) having an inlet (72), a vapor outlet (74), and a liquid outlet (76);
- a first heat exchanger (602);
- at least one expansion device (28) other than the ejector;
- a second heat exchanger (302);
- and
- a plurality of conduits (80, 110, 140, 144, 148, 152, 154, 156) and a plurality of valves (100, 130, 310, 320, 380, 680, 682, 684) positioned to provide alternative operation in:
- a cooling mode wherein a flowpath segment passes from the first heat exchanger through a first expansion device (28) of the at least one expansion device to the second heat exchanger and the needle is in the closed position to block flow from the motive flow inlet;
- and
- a first heating mode wherein a flowpath segment passes from the second heat exchanger through the motive flow inlet, the separator inlet and liquid outlet, and the first expansion device and to the first heat exchanger,
- wherein:
- the first heat exchanger comprises:
- a first manifold (674);
- a second manifold (676);
- and
- a third manifold (622);
- in the cooling mode refrigerant passes through a first section of the first heat exchanger and a second section of the first heat exchanger in series;
- and
- in the first heating mode refrigerant passes through the first section of the first heat exchanger and the second section of the first heat exchanger in parallel.
17 more elements
Dependencies are inferred from the claim text.